Concord, Massachusetts is located West-northwest of Boston, Northwest of Lincoln. It abuts Acton, Carlisle, Bedford, Sudbury, and Lincoln. According to Wikipedia, there were 17,668 people living in Concord as of 2010. There are two main commercial centers -- West Concord and Concord Center -- which are both very pedestrian friendly and have great restaurants, cafes and shops. They also each have a MBTA stop on the Fitchburg line into Porter Square and North Station.
The schools in Concord are outstanding.
Basic market information about the Concord, MA real estate market for 2015:
191 houses sold in total, with and average of 3,282 square feet, an average list price (at the time of sale) of $1,158,376 and an average sale price of $1,136,293. On average, it took 53 days to receive an offer.